Wood-boring machine



(No Model.) I 2 Sheets-Sheet 1.

WOOD BORING MACHINE.

No. 375,223. Patented Dec. 20, 1887.

WITNESSES Edu/c'n/I 1 /640625 27 .4 torney N. PET'ERS. Prmwunw m mr.Washington, 0 a

(NoModelJ 2 Sh-eetsSheet 2.

G. SWAN.

WOOD BORING MACHINE.

No. 375,223. Patenteo. 20, 1887.

A In %r WITNESSES .Zkw (Ln I .dttorney UNITED STATES PATENT OFFICE.

G ORGE SWAN, or GRAND VIEW, OHIO.

WOOD-BORING MACHINE.

SPECIFICATION forming part of Letters Patent No. 375,223, dated December20, 1887.

Application filed June 28, 1887. Serial No. 242,741. (No model.)

To all whom it may concern:

Be it known that I, GEORGE SWAN, a citizen of the United States,residing at Grand View,

it appertains to make and use the same.

My invention relates to wood-boring machines; and it has for its objectto provide a durable and inexpensive machine of simple construction,with an interchangeable gearing to increase or decrease the speed of thespindle and an auxiliary shaft to increase the power and facilitate theoperation of the machine, as well as a pressure-bar to feed thedrill;and it consists of the parts and combinations of parts-hereinafterdescribed and. claimed.

In the accompanying drawings, forming a part of this specification,Figure 1 is a front elevation of my machine; Fig. 2, a vertical sectionon the line a: m, Fig. 1; Fig. 3, a detail view of the bit-socket; Fig.4, a plan view of the-machine; Fig. 5, a detailv view, and Fig. 6 adetail view showing a part of the supporting-arm T and the cross-bar B.

Similar letters refer to similar parts throughout theseveral views.

A represents two uprights, which are joined-- or secured together attheir upper and lower ends by cross-bars B; and G, a base or bed frame,to one end of which the uprights are secured by hinges a, so that theuprights may be adjusted to any desired angle or folded on the base forpacking. On each side of the bedframe one end of quadrantal guides D,having slots 0, are pivoted, and also to the sides of the uprights bythumb-screws b, passing through the slots 0, whereby, the uprights aresecurely held in their adjusted position.

E is a sliding frame consisting of the uprights 6, joined together bythe cross-bar f near their lower ends, and having bearings for the shaftF-near their upper ends. The uprights 6 are grooved along their lengthsat their outer sides to fit tracks 9, formed on the inner sides ofuprights A, and along which the carriage slides. Projecting outwardlyfrom the uprights e of the carriage are the brackets h, in which theauxiliary shaftHhas its bearings. On each end of this shaft crankhandlesm are secured, and between one of these handles and the bracket h,on oneside of the machine, a small spur-cog, G, is secured on the shaft H,which meshes with a cog-wheel, G, secured to one end of the shaft 'F.The other end of the shaft F carries a fiy-wheel, K, to balance theshaft. Between the uprights e a large bevel-wheel, L, is mounted rigidlyon shaft F,and meshes with a small bevel or crown wheel, M, rigidlysecured to the upper end of the spirally-grooved spindle N, saidbevelvwheel M and spindle being supported by the cross-bar f, throughwhich the spindle passes.

On spindle N, above the cross-bar P, a collar, O, is secured byaset-screw, so that it may be adjusted thereon at different heights tothrow or trip the trigger,'hereinafter described at the desired depth ofbore, and thus reverse the travel of the spindle. A crossbar, P,- havingan enlarged central portion, 19, through an opening in which the spindlepasses andis guided, is secured at each end to the uprights A. At oneside of the enlarged portion 1) of the cross-bar 1? a notch is formed inthe upper edge, and in the cross-bar at that side a slot is formed inwhich a pin, 1', having a thumbpiece, 3, thereon, is inserted, asindicated by the dotted lines in Fig. 1, a spiral spring, t, beingfitted beneath the thumb-piece in the groove and bearing against anoffset on the pin to throw it forward, when the forward end .of thetrigger T, which is pivoted between the walls of the slot and projectsinto and above the notch in the enlarged portion, is depressed by thecollar 0, thus raising its rear end and releasing the pin, so that itmay enter an openingin the enlarged portion p of the crossbar P, saidopening being in line with the slot in the cross-bar, so that the pinwill engage the spiral groove in the spindle and thus reverse thedirection of travel of said spindle and withdraw the auger or bit fromthe wood in which it is working.

R represents a pressure-plate having its under side or surface concaved,so as to fit the shaft F. This plate is supported and operated by ascrew-rod, S, the lower end of which works in the plate, and whichpasses through a screw-threaded cpening in a supportingarm, T, one endof which is fitted in a dovetailed slot, of, formed in the uppercrossbar,

B, so as to be easily removed when desired, as clearly shown in Fig. 6.

The object of the plate It is to stop the upward movement of the spindlewhen the auger has been completely withdrawn from the wood and preventthe carriage working up off the tracks. When a drill or reamer is used,however, the plate acts also as a pressure-feed therefor, the operatorin this case working the machine with one hand and using the other tofeed the drill to its work by turning the screw and forcing the platedown on the shaft F of the carriage, while his weight, as it iscustomary for the operator to sit on the base, prevents the machine fromrising up.

As clearly shown in Fig. 5, the cog-wheels G and G are provided withsquare eyes for the square ends of the shafts F and H, the eyes of bothwheels being the same size, so that they may be changed from one shaftto the other to change the speed of the spindle. Thus when the smallwheel G is on shaft H and the large wheel on shaft F the machine isadapted for heavy work with a large auger,

and when they are changed from one shaft to the other the speed of thespindle will be greatly increased, suitable for small augers, drills,&c.

The lower end ofspindle N is screw-threaded, as shown,,f0r the purposeof securing the bitstock A (see Fig. 3,) thereto. This stock is screwthreaded internally at one end and formed with the ordinary taperingsocket, h, at the other end to receive the end of the bit. At one side arecess, a, is formed in the stock opposite the tapering socket h, andhas an opening, 1), entering the same. In this recess a double-armedlever or catch, 0, is pivoted, one arm of which projects outwardlyslightly beyond the outer surface of the stock, while the other armenters the opening I). A Spring, (1, is secured in adownwardly-cxtending eontinuation, It, of the recess a, and has, itsfree end working or pressing against thelever, the tendency being tokeep that arm of the lever which enters the opening I) always throwninward, while pressure on the other arm will force the same out againstthe sprin The object of this device is to securely hold the bit, whichis notched to receive the end of the arm of the lever in place ready foroperation,

whilea slightprcssure on the other arm, foreing the same inward,willrelease the same and permit the bit to drop out.

Having thus described my invention, what I claim as new, and desire tosecure by Letters Patent, is-

1. A boringmachine consisting of the base 0, the hinged uprights A,having the tracksg on their inner sides, sliding frame or carriage E,the grooved uprights e and cross-barf, the brackets h, auxiliary shaftH, having its bearings in said brackets, the interchangeable gearing GG, the cranks m, the shaft F, having its hearings in uprights e andcarrying the balance-wheel K and bevel-wheel L, the latter being locatedbetween said uprights, the spirally-grooved spindle N, supported in thecross-bar f, the bevel-wheel rigidly attached to the upper end of saidspindle, the collar 0, adj ustably secured on said spindle, the slottedcross-bar P, having the enlarged portion 19, the trigger and pin locatedin said slotted bar, a suitable bit-stock, and a pressure-plateremovably secured in the frame of the machine above the sliding frameand adapted to press said frame downwardly, as set forth.

2. The combination, with a boring-machine having a sliding frame, of thearm T, removably secured in the main frame of the machine, the screw-rodS, working in said arm, and the pressure-plate R, having a concavedunder surface adapted to lit the main shaft of the machine,substantially as described.

3. The combination, in a boring-machine, of aspindle having ascrew-threaded lower end, a bit-stock having one end internallyscrewthreaded and its other provided with a tapering socket, acontinuation-recess formed in said stock opposite to and communicatingwith said socket and having a downwardlycxtcnding continuation, a leverhaving two arms proj eetin g at right angles therefrom pivotally securedin said recess, and a spring having one end rigidly secured in thecontinuation of the recess and the other or free end working againstsaid lever,substantially as described.

In testimony whereof Iaffix my signature in presence of two witnesses.

GEORGE SWAN.

Witnesses:

ERNEST Marian, W. B. TALBOT.

